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Paulo S. L. M. Barreto
Paulo S. L. M. Barreto (born 1965) is a Brazilian cryptographer and one of the designers of the Whirlpool (algorithm), Whirlpool cryptographic hash function, hash function and the block ciphers Anubis (cipher), Anubis and KHAZAD, together with Vincent Rijmen. He has also co-authored a number of research works on elliptic curve cryptography and pairing-based cryptography, including the eta pairing technique, identity-based cryptography, identity-based cryptographic protocols, and the family of Barreto–Naehrig curves, Barreto–Naehrig (BN) pairing-friendly elliptic curve cryptography, elliptic curves. More recently he has been focusing his research on post-quantum cryptography, being one of the discoverers of quasi-dyadic codes and quasi-cyclic moderate-density parity-check (QC-MDPC) codes to instantiate the McEliece cryptosystem, McEliece and Niederreiter cryptosystem, Niederreiter cryptosystems and related schemes. His paper "Efficient Algorithms for Pairing-Based Cryptosystems" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salvador, Bahia
Salvador (English: ''Savior'') is a Brazilian municipality and capital city of the state of Bahia. Situated in the Zona da Mata in the Northeast Region of Brazil, Salvador is recognized throughout the country and internationally for its cuisine, music and architecture. The African influence in many cultural aspects of the city makes it a center of Afro-Brazilian culture. As the first capital of Colonial Brazil, the city is one of the oldest in the Americas and one of the first planned cities in the world, having been established during the Renaissance period. Its foundation in 1549 by Tomé de Sousa took place on account of the implementation of the General Government of Brazil by the Portuguese Empire. Centralization as a capital, along with Portuguese colonization, were important factors in shaping the profile of the municipality, as were certain geographic characteristics. The construction of the city followed the uneven topography, initially with the formation of two leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Identity-based Cryptography
Identity-based cryptography is a type of public-key cryptography in which a publicly known string representing an individual or organization is used as a public key. The public string could include an email address, domain name, or a physical IP address. The first implementation of identity-based signatures and an email-address based public-key infrastructure (PKI) was developed by Adi Shamir in 1984, which allowed users to verify digital signatures using only public information such as the user's identifier. Under Shamir's scheme, a trusted third party would deliver the private key to the user after verification of the user's identity, with verification essentially the same as that required for issuing a certificate in a typical PKI. Shamir similarly proposed identity-based encryption, which appeared particularly attractive since there was no need to acquire an identity's public key prior to encryption. However, he was unable to come up with a concrete solution, and identity-based ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scopus Tecnologia S/A
Scopus is Elsevier's abstract and citation database launched in 2004. Scopus covers nearly 36,377 titles (22,794 active titles and 13,583 inactive titles) from approximately 11,678 publishers, of which 34,346 are peer-reviewed journals in top-level subject fields: life sciences, social sciences, physical sciences and health sciences. It covers three types of sources: book series, journals, and trade journals. All journals covered in the Scopus database are reviewed for sufficiently high quality each year according to four types of numerical quality measure for each title; those are ''h''-Index, CiteScore, SJR (SCImago Journal Rank) and SNIP ( Source Normalized Impact per Paper). Searches in Scopus also incorporate searches of patent databases. Overview Comparing ease of use and coverage of Scopus and the Web of Science (WOS), a 2006 study concluded that "Scopus is easy to navigate, even for the novice user. ... The ability to search both forward and backward from a particular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unisys Brazil Ltd
Unisys Corporation is an American multinational information technology (IT) services and consulting company headquartered in Blue Bell, Pennsylvania. It provides digital workplace solutions, cloud, applications, and infrastructure solutions, enterprise computing solutions, and business process solutions for organizations around the world. History Founding Unisys was formed in 1986 through the merger of mainframe corporations Sperry and Burroughs, with Burroughs buying Sperry for $4.8 billion. The name was chosen from over 31,000 submissions in an internal competition when Christian Machen submitted the word "Unisys" which was composed of parts of the words ''united'', ''information'' and ''systems''. The merger was the largest in the computer industry at the time and made Unisys the second largest computer company with annual revenue of $10.5 billion. Michael Blumenthal became CEO and Chairman. Soon after the merger, the market for proprietary mainframe-class systems—the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 States of Brazil, states and the Federal District (Brazil), Federal District. It is the largest country to have Portuguese language, Portuguese as an List of territorial entities where Portuguese is an official language, official language and the only one in the Americas; one of the most Multiculturalism, multicultural and ethnically diverse nations, due to over a century of mass Immigration to Brazil, immigration from around the world; and the most populous Catholic Church by country, Roman Catholic-majority country. Bounded by the Atlantic Ocean on the east, Brazil has a Coastline of Brazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bahia
Bahia ( , , ; meaning "bay") is one of the 26 Federative units of Brazil, states of Brazil, located in the Northeast Region, Brazil, Northeast Region of the country. It is the fourth-largest Brazilian state by population (after São Paulo (state), São Paulo, Minas Gerais, and Rio de Janeiro (state), Rio de Janeiro) and the 5th-largest by area. Bahia's capital is the city of Salvador, Bahia, Salvador (formerly known as "Cidade do São Salvador da Bahia de Todos os Santos", literally "City of the Saint Savior of the Bay of All the Saints"), on a Spit (landform), spit of land separating the Bay of All Saints from the Atlantic. Once a monarchial stronghold dominated by Agriculture in Brazil, agricultural, Slavery in Brazil, slaving, and ranching interests, Bahia is now a predominantly Working class, working-class industrial and agricultural state. The state is home to 7% of the Brazilian population and produces 4.2% of the country's GDP. Name The name of the state derives from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salvador, Brazil
Salvador (English: ''Savior'') is a Brazilian municipality and capital city of the state of Bahia. Situated in the Zona da Mata in the Northeast Region of Brazil, Salvador is recognized throughout the country and internationally for its cuisine, music and architecture. The African influence in many cultural aspects of the city makes it a center of Afro-Brazilian culture. As the first capital of Colonial Brazil, the city is one of the oldest in the Americas and one of the first planned cities in the world, having been established during the Renaissance period. Its foundation in 1549 by Tomé de Sousa took place on account of the implementation of the General Government of Brazil by the Portuguese Empire. Centralization as a capital, along with Portuguese colonization, were important factors in shaping the profile of the municipality, as were certain geographic characteristics. The construction of the city followed the uneven topography, initially with the formation of two leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomson ISI
The Institute for Scientific Information (ISI) was an academic publishing service, founded by Eugene Garfield in Philadelphia in 1956. ISI offered scientometric and bibliographic database services. Its specialty was citation indexing and analysis, a field pioneered by Garfield. Services ISI maintained citation databases covering thousands of academic journals, including a continuation of its longtime print-based indexing service the Science Citation Index (SCI), as well as the Social Sciences Citation Index (SSCI) and the Arts and Humanities Citation Index (AHCI). All of these were available via ISI's Web of Knowledge database service. This database allows a researcher to identify which articles have been cited most frequently, and who has cited them. The database provides some measure of the academic impact of the papers indexed in it, and may increase their impact by making them more visible and providing them with a quality label. Some anecdotal evidence suggests that appeari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRYPTO (conference)
Crypto commonly refers to: * Cryptocurrency, a type of digital currency secured by cryptography and decentralization * Cryptography, the practice and study of hiding information Crypto or Krypto may also refer to: Cryptography * Cryptanalysis, the study of methods for obtaining the meaning of encrypted information * CRYPTO (conference), an annual cryptographical and cryptoanalytic conference * Crypto++, a free, open source library of cryptographic algorithms and schemes *'' Crypto: How the Code Rebels Beat the Government—Saving Privacy in the Digital Age'', a book about cryptography by Steven Levy * Crypto AG, a Swiss manufacturer of encrypted communications products Finance * crypto.com, a cryptocurrency online News platform. Biology and medicine * ''Cryptococcus'' (fungus), a genus of fungus that can cause lung disease, meningitis, and other illnesses in humans and animals ** Cryptococcosis (also called cryptococcal disease), a disease caused by ''Cryptococcus'' * ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niederreiter Cryptosystem
In cryptography, the Niederreiter cryptosystem is a variation of the McEliece cryptosystem developed in 1986 by Harald Niederreiter. It applies the same idea to the parity check matrix, H, of a linear code. Niederreiter is equivalent to McEliece from a security point of view. It uses a syndrome as ciphertext and the message is an error pattern. The encryption of Niederreiter is about ten times faster than the encryption of McEliece. Niederreiter can be used to construct a digital signature scheme. Scheme definition A special case of Niederreiter's original proposal was broken but the system is secure when used with a Binary Goppa code. Key generation #Alice selects a binary (''n'', ''k'')-linear Goppa code, ''G'', capable of correcting ''t'' errors. This code possesses an efficient decoding algorithm. #Alice generates a (''n'' − ''k'') × ''n'' parity check matrix, ''H'', for the code, ''G''. #Alice selects a random (''n'' − ''k'') × (''n'' − ''k'') binary invertible matri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McEliece Cryptosystem
In cryptography, the McEliece cryptosystem is an asymmetric encryption algorithm developed in 1978 by Robert McEliece. It was the first such scheme to use randomization in the encryption process. The algorithm has never gained much acceptance in the cryptographic community, but is a candidate for "post-quantum cryptography", as it is immune to attacks using Shor's algorithm and – more generally – measuring coset states using Fourier sampling. The algorithm is based on the hardness of decoding a general linear code (which is known to be NP-hard ). For a description of the private key, an error-correcting code is selected for which an efficient decoding algorithm is known, and which is able to correct t errors. The original algorithm uses binary Goppa codes (subfield codes of geometric Goppa codes of a genus-0 curve over finite fields of characteristic 2); these codes can be efficiently decoded, thanks to an algorithm due to Patterson. The public key is derived from the priv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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